HBASE-8377 IntegrationTestBigLinkedList calculates wrap for linked list size incorrectly

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HBASE-8354 Backport HBASE-7878 'recoverFileLease does not check return value of recoverLease' to 0.94 (Liang Xie)



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Merge remote branch 'origin/0.94' into 0.94-gd
HBASE-6870 HTable#coprocessorExec always scan the whole table

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Merge remote branch 'origin/0.94' into 0.94-gd
updated timeout:
    <surefire.timeout>7200</surefire.timeout>
Merge remote-tracking branch 'origin/0.94-gd' into 0.94-gd
HBASE-8389 HBASE-8354 DDoSes Namenode with lease recovery requests (Varun and Ted)



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Merge remote branch 'origin/0.94' into 0.94-gd
Merge remote branch 'origin/0.94-gd' into fb-YAHOO-316-0.94-gd